Notes / Hong Kong
HKIS vs CIS vs ESF Island School: How They Compare
An analytical comparison of Hong Kong's three most-searched top schools across curriculum, results, fees and debentures, and community feel.
Comparison table
| School | Curriculum | Ages | Fees range (HKD) | Notes |
|---|---|---|---|---|
| Hong Kong International School | American, AP | 4–18 | 231,600–272,600 | Debenture up to ~HKD 3m for priority admission; 25 AP courses; ~3,000 students; two south-side campuses |
| Chinese International School | Full IB continuum, bilingual | 4–18 | 216,100–342,800 | Equal English/Putonghua primary; IB DP avg 38.95 (2025); Year 10 in Hangzhou; capital levy plus nomination/debenture options |
| Island School | IB MYP, IGCSE/BTEC, IB DP/CP | 11–18 | 174,200–188,300 | No debenture; ESF capital levy at entry; IB DP avg 37.1 (2025); Borrett Road, Mid-Levels |
The brief
- HKIS is American to its core. Founded 1966 by the Lutheran Church–Missouri Synod, it runs AP rather than IB and routes graduates toward US universities, with around 3,000 students across two south-side campuses.
- CIS is bilingual by design. Hong Kong's first IB school splits primary teaching equally between English and Putonghua and runs the full IB continuum through to a Diploma where Bilingual completions are common.
- Island School is the original ESF. Founded 1967, a Years 7–13 secondary on Borrett Road in Mid-Levels, using IB MYP into IGCSE/BTEC and the IB Diploma, with around 1,200 students.
- Debentures vs no debenture is the big financial fork. HKIS sits behind a corporate or individual debenture reaching HKD 3 million for priority admission. CIS uses a capital levy and nomination/debenture rights. Island School has no debenture; new entrants pay a one-off ESF capital levy.
- The three schools occupy different tiers by demographic, not by gate. HKIS skews toward the wealthiest expat and Hong Kong families, CIS leans bilingual and East-West aspirational, Island School is broader and closer to a large UK comprehensive done well.
# HKIS vs CIS vs ESF Island School: How They Compare
Hong Kong · Comparison
Three names dominate Hong Kong Island shortlists: Hong Kong International School (HKIS), Chinese International School (CIS) and Island School, the longest-running secondary in the English Schools Foundation network. They sit close enough in reputation to be lumped together in search results, yet they are built around fundamentally different academic, financial and cultural propositions.
Read the comparison as three answers to one question: how should a Hong Kong-based child be prepared for the world? HKIS answers in American, with Advanced Placement and a Lutheran heritage. CIS answers bilingually, through a full IB continuum where English and Putonghua share equal classroom time. Island School answers in the British–IB hybrid that has defined ESF for nearly six decades, with a debenture-free fee structure that materially changes the cost equation.
At a glance
HKIS is the largest of the three and the only one not running the IB Diploma. It offers 25 AP courses, follows a US elementary–middle–high structure, and operates from Repulse Bay (primary) and Tai Tam (secondary). The 2025 AP profile shows a 95% pass rate at score 3+ and 79% scoring 4 or 5.
CIS is mid-sized at around 1,600 students and the most academically distinctive of the three. Its IB DP average was 38.95 in 2025 with a 99% pass rate, 49% scoring 40+ and 28% earning the Bilingual Diploma. Year 10 students complete a residential year in Hangzhou.
Island School is secondary-only, ages 11–18, around 1,200 students on a rebuilt Borrett Road campus. The 2025 IB DP average was 37.1 with a top score of 45. As an ESF school it runs IB MYP, IGCSE and BTEC into the IB Diploma or Career-related Programme.
Curriculum
The curriculum differences are the cleanest dividing line. HKIS is the only one of the three offering an American diploma, with AP as the academic ceiling. That suits families targeting US undergraduate admissions, where a transcript-plus-AP profile reads more naturally than a converted IB score. The Lutheran identity is light-touch but present: Christian education classes appear in the timetable, though the day-to-day culture is largely secular.
CIS runs the full IB continuum from PYP to DP, but its defining feature is the bilingual model. From Reception through Year 6, English-medium and Putonghua-medium teachers share classroom time on roughly equal terms. By the time CIS students reach the Diploma, a significant minority complete it bilingually, meaning subjects in two languages at a level recognised on the IB transcript. Families without prior Chinese tend to find the lower primary years demanding.
Island School uses IB MYP through Year 9, then IGCSEs with BTEC options in Years 10–11, then the IB Diploma or IB Career-related Programme in Years 12–13. This is the standard ESF spine, with a broad sixth-form offer where BTEC routes in sport, business or media sit alongside academic IB choices.
Results
A direct numerical comparison only works between CIS and Island School, since HKIS does not sit the IB.
CIS published a Class of 2025 IB DP average of 38.95 out of 45 (down from 39.7 in 2024), with 49% scoring 40+ and 28% earning a Bilingual Diploma. The average subject grade was 6.15 out of 7. The bilingual completion rate is the genuinely unusual data point.
Island School's 2025 IB DP average was 37.1, with 39% scoring 40+ and 72% scoring 35+. The highest score was 45, the maximum possible. Read against the global IB DP average of 30.5, these are strong in absolute terms, and very strong for a school with the broader intake characteristic of ESF entry.
HKIS publishes an AP rather than IB profile. In 2025, 95% of exams earned a 3 or above and 79% earned a 4 or 5. Nearly 100% of graduates progress to tertiary study, with placements skewed toward US selective universities. AP and IB outcomes differ in structure, breadth and university recognition, and a strong AP transcript at HKIS opens different doors than a 38-point IB Diploma from CIS.
Fees and what they include
Tuition alone gives a misleading picture, because debenture and capital-levy structures sit on top.
HKIS publishes 2025–26 tuition between roughly HKD 231,600 and 272,600. The school operates a debenture system: an Individual Debenture or Corporate Nomination Right is effectively required for priority admission, with the headline corporate figure quoted by parents at around HKD 3 million. Debentures are refundable on exit, but tie up significant capital and create a strong filtering effect on the parent body.
CIS publishes 2025–26 tuition between HKD 216,100 and 342,800. The school operates a capital levy and nomination rights structure, with several entry routes including debentures and corporate nominations that influence admissions priority. Fees include the Hangzhou residential programme in Year 10.
Island School is the cleanest fee picture of the three. Tuition runs between HKD 174,200 and 188,300. There is no debenture. New entrants pay a one-off ESF capital levy, set at foundation level and materially smaller than an HKIS debenture. The all-in cost of an ESF education at Island School over seven years is a fraction of the HKIS or CIS equivalent.
Community and feel
HKIS is the largest and most concentrated in expat affluence, with roughly 39% US, 20% Hong Kong and 41% other nationalities, and a faculty-to-student ratio of around 1:11. The two-campus structure (Repulse Bay primary, Tai Tam secondary) creates a self-contained social geography. Parents describe the environment as competitive and high-resource. A live legal dispute with the founding Lutheran church over governance has not affected day-to-day operations.
CIS feels different in a way that is hard to convey without visiting. The bilingual model produces a student body where Putonghua is a working language of school life, not a foreign subject, and where roughly 30 nationalities mix on a Braemar Hill campus designed around three central courtyards. The Year 10 Hangzhou residential gives the secondary cohort a shared cultural reference point.
Island School has the broadest social mix of the three, with the ESF intake characteristic of a school where local Hong Kong, long-term expat and recently arrived families sit alongside each other. The rebuilt Borrett Road campus opened in 2018 with a 25-metre pool, a 1,200-seat sports hall, performance space and climbing wall. The character is closer to a large, well-resourced British secondary than to the more boutique feel of CIS.
Admissions
HKIS admissions are competitive at every entry point, with Reception 1 (age 4) the largest intake. The debenture system functions as both a financial and prioritisation filter. Maximum class sizes run 16–18 in Reception 1, rising to 21–24 in Grades 3–12.
CIS admits primarily at Reception, Year 1 and Year 7. Assessment includes age-appropriate language and reasoning components, and bilingual capability is examined seriously for entry above lower primary.
Island School admits through ESF Central Admissions. The standard entry point is Year 7. Sibling priority and Hong Kong residency criteria apply, and the absence of a debenture means the financial barrier is lower than at the other two.
How to read the comparison
If the family is targeting US universities and the household can absorb a debenture, HKIS is structurally the right shape.
If the family wants its child to leave Hong Kong genuinely bilingual in English and Putonghua, CIS is the only one of the three set up to deliver that outcome.
If the family wants a strong IB Diploma at a fraction of the all-in cost, with a broader social mix and no debenture, Island School is the cleanest fit.
The prior question is not which school is "best", but which curriculum and which financial structure the family is optimising for.
FAQs
Does Island School offer a primary section? No. Island School is secondary-only, Years 7–13, ages 11–18. ESF primary feeders include Bradbury, Glenealy, Peak, Kennedy and Quarry Bay, with central allocation to ESF secondaries.
Can a non-Chinese-speaking family enter CIS in Reception? Yes, and many do. The bilingual programme is designed to bring students with no prior Chinese to working proficiency by upper primary, but the demands on home support and student effort are real, and CIS does not soften that message in admissions.
What happens at HKIS without a debenture? Admission is possible but lower priority. Families without an Individual Debenture or Corporate Nomination Right pay a non-refundable Individual Capital Levy and join the standard waitlist, which moves more slowly than the debenture queue.
How do IB scores at CIS and Island School compare to global averages? Both sit well above the global IB DP average of 30.5. CIS averaged 38.95 in 2025, Island School averaged 37.1. CIS has a higher concentration of 40+ scorers; Island School has produced 45-point students in recent cohorts.
Is the ESF capital levy refundable? No. It is a one-off contribution payable at entry, distinct from the refundable debenture structures used at HKIS and CIS.
Which school suits a family planning to leave Hong Kong in five years? IB Diploma scores from CIS or Island School translate more cleanly across UK, Australian and European university systems. An HKIS transcript with strong APs translates most cleanly into US admissions.